Manufacture of rolled metal disks



B A Br I Nov. 10 1925. 1,561,346

F. MILLIKEN MANUFACTURE OF ROLLED METAL DISKS Filed D00. 4, 1920 WITNESSES MENTOR kid/f. 920 1 fbsl elz/ z'llzk L I between successive rollings to alternately Patented Nov. 10, 1925.

UNITED STATES PATENT: OFFICE.

ros'rm MILLIxEN, or LAwnEncE, NEW YORK.

MANUFAUTURE or Roman miner. mas;

Application filed December 4, 1920. Serial No. 428,331.

I '0 all whom it may concern:

Be it known that I, Fos'rnn MILLIKEN, a citizen of the United States, and aresident of Lawrence, in the county of Nassau and State of New York, have invented'new and useful Improvements in the Manufacture of Rolled Metal Disks, of which the following is a full, clear, and exact description.

The object of the invention 'isto provide certain new and useful improvements in the manufacture of rolled metaldisks whereby the cost of production is greatly reduced and waste of material is practically eliminated.

Another object is to render the rolled metal disk exceedingly homogeneous .and uniform in texture or fiber.

Another object is to permit of. running the rolling mill used for rolling the disks with less" power than that required for rolling rectangular sheets or plates to be subsequentl cut up into disks.

In or er to produce the desired result a metal disk of approximately circular form is subjected to repeated rolling actions in a rolling mill and with the disks partly turned elongate and circularize the disk, decrease its thickness and increase its diameter; with the fiber rolled in difl'erentdirections thereby increasing the tensile strength of the disk.

In the manufacture of-rolled metal disks as heretoforepracticed, it has been customary to roll the metal'in a rolling mill into a rectangular or square sheet or plate and then cut or stamp disks out of the sheet or plate. This cutting or stamping-operation requires an -expe nsive machine and, at least, one attendant, thus necessarily increasing the cost of manufacture of the diskbesides producing a large amount of waste or scrap amounting anywhere from25 per cent to 50'.

per cent of the amount? of metal rolled. With my process aboveoutlmed and pres-- ently described in detail, the cost of production is reduced and the formation of scrap, if not.entirely-eliminated, is, at least, reduced to a" minimum.

In the drawings which form a part of this specification, Figures 1 and 2 re resent diagrammatic views of the successive steps in rolling out the metal disk.

A metal disk 10, cast or otherwise pro- .duced and of approximately circular sha e, 'is passed between a pair of rolls 11 o a suitable rolling mill whereby the disk is r'educed in thickness and rolled into an elongated, approximately oval or elliptic shape,

that is, the diameter A, Aof the disk 10 and extending transversely to the .rolls 11 ,is increased toform the major axis of an diameter'B, B whereby-it is rolled into circular form of a, larger diameter and lesstluckness than the disk had originally. If

necessary, the foregoingtwo. rolling actions are repeated as many times as are necessary to roll the disk until the desired predetermined diameter and thickness is reached.

The drawin s indicate direction of rolling only and -apphcantdoes not limit himself to passing the disks between the rollers once. but may ass the same back and forth a number of times if desired, though ordinarily if the disk is fairly hot it will become elongated as illustrated in Figure l with one rolling action and resume a substantially round position when rolled in. a direction at right. angles-to the first rolling. The elongation from one rolling may be small or comparatively great, according to the hotness "of metal and according to the pressure Althoughthe two-successive steps above described produce the desired result, it is not abs'olutel necessary to give a quarter turnto the the disk but slightly and progressively turned between a correspondingly large.

number of rolling actions to produce the isk between successive rolling actions as this operation can be varied and desired result. It will be seen that by the method described the original circular disk is elongated and. circularized by repeated rolling' actions whereby the disk produced has an increased diameter and a decreased icslhieikness in comparisonv with the original It will be noticed that by rolling the disk in the manner described, the direction of the fiber or texture of the metal is changed, that is, the 'fiber is not solely drawn in one direction only, as is the case in rolling out sheets passed through the rolls in the same direction during .each rolling operation. Thus the fiber extends in different directions and hence the tensile strength'of the finished product is greater in comparison with that of similar disks cut from rolled sheets.

When rolling sheet metal a considerable torque is produced in the rolling operation owing to the rolls taking hold of the sheet throughout the entire width thereof. In rolling out a sheet as above described the torque on the metal starts at practically nothing as the front edge of the peripheral face of. the disk enters between the rolls, and the torque increases gradually until it reaches its maximum at the timethe disk is half way through the rolls, and then the torque gradually decreases until the disk is completely through the rolls. Thus it'takes less power to run the mill for rolling out disks than is required to roll a square or rectangular sheet of about the same area. The

' rolhng may be done with the disk either hot or cold.

' Having thus described my invention, I claim as new and desire to secure by-Letters Patent 1. The herein described method of producing a rolled metal disk of uniform thickness throughout, which consists in subjecting the entire surface of a circular disk to a rolling action between a pair of rolls to reduce the disk and elongate it in one direction, then turning the disk and again subjecting the entire disk to a rolling actioning' the disk to rolling action of said rolls to elongate the disk in another direction.

3. The herein described method of pr0- ducing a rolled metal disk of uniform thickness throughout which consists in casting an approximately circular disk, then rolling the disk into elongated shape, then turning the disk and again rolling it into approximately circular shape.

FOSTER MELIKEN. 

